Leadership : BEHAVIORAL & STYLES Theory

In response to the criticism of the trait approach, theorists began to research leadership as a set of behaviors, evaluating the behavior of 'successful' leaders, determining a behavior taxonomy and identifying broad leadership styles.David McClelland, for example, saw leadership skills, not so much as a set of traits, but as a pattern of motives. He claimed that successful leaders will tend to have a high need for power, a low need for affiliation, and a high level of what he called activity inhibition (one might call it self-control).

Kurt Lewin, Ronald Lipitt, and Ralph White developed in 1939 the seminal work on the influence of leadership styles and performance. The researchers evaluated the performance of groups of eleven-year-old boys under different types of work climate. In each, the leader exercised his influence regarding the type of group decision making, praise and criticism (feedback), and the management of the group tasks (project management) according to three styles: (1) authoritarian, (2) democratic and (3) laissez-faire.Authoritarian climates were characterized by leaders who make decisions alone, demand strict compliance to his orders, and dictate each step taken; future steps were uncertain to a large degree. The leader is not necessarily hostile but is aloof from participation in work and commonly offers personal praise and criticism for the work done. Democratic climates were characterized by collective decision processes, assisted by the leader. Before accomplishing tasks, perspectives are gained from group discussion and technical advice from a leader. Members are given choices and collectively decide the division of labor. Praise and criticism in such an environment are objective, fact minded and given by a group member without necessarily having participated extensively in the actual work. Laissez faire climates gave freedom to the group for policy determination without any participation from the leader. The leader remains uninvolved in work decisions unless asked, does not participate in the division of labor, and very infrequently gives praise. The results seemed to confirm that the democratic climate was preferred.
The managerial grid model is also based on a behavioral theory. The model was developed by Robert Blake and Jane Mouton in 1964 and suggests five different leadership styles, based on the leaders' concern for people and their concern for goal achievement.

source: http://www.wikipedia.org